import java.util.Scanner;
//在父类Base中定义了计算方法calculate()，该方法用于计算两个数的乘积（X*Y）。请在子类Sub中重写该方法，将计算逻辑由乘法改为除法（X/Y）。注意，当分母为0时输出“Error”。
public class t0130{

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        while (scanner.hasNextInt()) {
            int x = scanner.nextInt();
            int y = scanner.nextInt();
            Sub sub = new Sub(x, y);
            sub.calculate();
        }
    }

}

class Base {

    private int x;
    private int y;

    public Base(int x, int y) {
        this.x = x;
        this.y = y;
    }

    public int getX() {
        return x;
    }

    public int getY() {
        return y;
    }

    public void calculate() {
        System.out.println(getX() * getY());
    }

}

class Sub extends Base {

    public Sub (int x, int y) {
        super(x,y);
    }
    public void calculate(){
        if(getY()==0){
            System.out.println("Error");
        }else{
            System.out.println(getX() / getY());
        }
    }


    //write your code here......


}